Hi everybody,

I don't understand why there are a pair of layers with the same name:
xxCu and xxCmp. Which is the use for each one?

... and the utility of the layers ECO1 and ECO2?

Please, I need an answer for idiots... thanks...

bye

fernando

Le Jeudi 20 Octobre 2005 14:10, Ian bell a écrit?:

fluissman wrote:

Hi everybody,

I don't understand why there are a pair of layers with the same name:
xxCu and xxCmp. Which is the use for each one?

Cu means Copper ("Cuivre" in french).
This is the layer where you sold the component.

Cmp means "Component". It's the layer where you insert and see the
components.

Even if you do a single layer layout, then, the layer "Component" can
be considered as a manual layer you will use to put some strip wire
(so, I mean, nornal wire, but not copper on the pcb).
So, it's better you stay with 2 layers routing in any case.

I am confused about layers too especially as I am trying to do a
single sided PCB layour. As far as I can make out there are always at
least two copper layers - the one on the bottom xxCu and the copper
on the top or component side xxCmp. All other copper layers are inner
copper layers and labelled as such. Trying to get the autorouter to
route just on the copper side only is quite hard.

... and the utility of the layers ECO1 and ECO2?

According to the help ECO1 and ECO2 are general layers for anything
you want.

Ian

fluissman wrote:

Hi everybody,
I don't understand why there are a pair of layers with the same name:
xxCu and xxCmp. Which is the use for each one?

I am confused about layers too especially as I am trying to do a single sided PCB layour. As far as I can make out there are always at least two copper layers - the one on the bottom xxCu and the copper on the top or component side xxCmp. All other copper layers are inner copper layers and labelled as such. Trying to get the autorouter to route just on the copper side only is quite hard.

... and the utility of the layers ECO1 and ECO2?

According to the help ECO1 and ECO2 are general layers for anything you want.

Ian

--
Ian T-Bell
aka RuffRecords
aka RedTommo
www.geocities.com/ruffrecords

Le Jeudi 20 Octobre 2005 14:10, Ian bell a écrit?:

fluissman wrote:

?Hi everybody,

?I don't understand why there are a pair of layers with the same name:
xxCu and xxCmp. Which is the use for each one?

Cu means Copper ("Cuivre" in french).
This is the layer where you sold the component.

Cmp means "Component". It's the layer where you insert and see the
components.

Even if you do a single layer layout, then, the layer "Component" can
be considered as a manual layer you will use to put some strip wire
(so, I mean, nornal wire, but not copper on the pcb).
So, it's better you stay with 2 layers routing in any case.

Anyway, you can make a single layer pcb if you want: at general options,
select 1 layer.

Layers xxCu and xxCmp are the bottom and top layers of a pcb. Any other layer
is an inner layer, where you can route the tracks and zones but you cannot
solder any component nor write any reference or draw the silkscreen.

fluissman wrote:
Please, I need an answer for idiots... thanks...

Una pcb tiene 2 caras externas: una arriba y otra abajo. Si haces una pcb
multicapa, tienes también varias capas internas. En la de arriba y en la de
abajo puedes dibujar la serigrafía de los componentes, sus referencias,
cotas, etc. En las internas no tiene sentido escribir nada, puesto que no se
ve. Y tampoco puedes soldar ningún componente dentro de la pcb, sólo arriba y
abajo.

Para una pcb casera te bastan las caras "cobre" y "componentes" y, si sólo
quieres una cara de componentes smd, te basta sólo la de "cobre". En plan
casero no se hacen ni serigrafías, ni máscaras de pasta para soldar, ni
máscaras de antisoldante, ni capas internas.


Regards,

Pedro.

Pedro Martín del Valle wrote:

Anyway, you can make a single layer pcb if you want: at general options,
select 1 layer.

Except the autorouter still tries to route on the component side as well.


Ian

Umm! I had not tested the autorouter with one layer.

We always use manual routing since we hadn't technology for metalising vias.
Now we are quite skillfull avoiding vias with manual routing :-)

Pedro.

JLJ wrote:

Even if you do a single layer layout, then, the layer "Component" can
be considered as a manual layer you will use to put some strip wire
(so, I mean, nornal wire, but not copper on the pcb).
So, it's better you stay with 2 layers routing in any case.

That makes sense. However, on a single layer PCB you normally wish to minimise the number of links. Is there some way to get the autorouter to do this i.e. route as many tracks as possible on the copper side and as few as possible on the component side? At the moment I force the autorouter to route only on the copper side by selecting both layers as copper in the 'Select Layer Pair' dialog.

Ian

--
Ian T-Bell
aka RuffRecords
aka RedTommo
www.geocities.com/ruffrecords

Pedro Martn del Valle wrote:

Anyway, you can make a single layer pcb if you want: at general options, select 1 layer.

Except the autorouter still tries to route on the component side as well.


Ian
--
Ian T-Bell
aka RuffRecords
aka RedTommo
www.geocities.com/ruffrecords

开云体育

Pedro Martín del Valle wrote:
>>Pedro Martín del Valle wrote:
>>
>>>Anyway, you can make a single layer pcb if you want: at general options,
>>>select 1 layer.
>>
>>Except the autorouter still tries to route on the component side as well.
>>
>>
>>Ian
>
>
> Umm! I had not tested the autorouter with one layer.
>
> We always use manual routing since we hadn't technology for metalising vias.
> Now we are quite skillfull avoiding vias with manual routing :-)
>
> Pedro.


I have discovered I can force the autorouter to work only on the
copper side by selecting copper for both layers in the Select Layer
Pairs dialog.

Ian

--
Ian T-Bell
aka RuffRecords
aka RedTommo
www.geocities.com/ruffrecords

Pedro Martn del Valle wrote:

Pedro Martn del Valle wrote:

Anyway, you can make a single layer pcb if you want: at general options,
select 1 layer.

Except the autorouter still tries to route on the component side as well.


Ian

Umm! I had not tested the autorouter with one layer.
We always use manual routing since we hadn't technology for metalising vias. Now we are quite skillfull avoiding vias with manual routing :-)
Pedro.

I have discovered I can force the autorouter to work only on the copper side by selecting copper for both layers in the Select Layer Pairs dialog.

Ian

--
Ian T-Bell
aka RuffRecords
aka RedTommo
www.geocities.com/ruffrecords

Ehlers, William (ES) wrote:

I have not reached the point of doing the PCB yet as I am still working the design. Is there no manual router? A single layer PCB, I wouldn't think, would not have the level of complexity that would require an auto route. I am new to KICAD and mean no disrespect just a question.

Yes it does have manual routing and as you say this is probably the preferable route for single sided PCBs. However, the autorouter is useful once you have an initial placement to give you an idea of which tracks are going to be the hard ones to route. It also gives you an idea of track desnity which can be important if you have a power circuit where fatter traces will be needed in places.

Ian

--
Ian T-Bell
aka RuffRecords
aka RedTommo
www.geocities.com/ruffrecords

--- In kicad-users@..., Ian bell <ianbell@...> wrote:

I have discovered I can force the autorouter to work only on the
copper side by selecting copper for both layers in the Select

Layer

Pairs dialog.

Ian

Hi
where do i find the Select Layer Pairs dialogue?

Fredrik